A large meal while wearing t'fillin (הא אכל ואינון עילוי) would be considered an interruption that diverts attention from t'fillin and thus requires the blessing to be repeated, as referred to the latter Beraisa.

According to Rabbi Z'eira Rabbi bar Yirmiyah interpreted the first Beraisa as referring to a snack (עראי) which does not constitute an interruption.